swh:1:snp:173f8deb0c56c557784b4fd217e7608ac6197844
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Tip revision: caca6a03d365883564885f2c1da3e88dcf65d139 authored by Linus Torvalds on 24 November 2011, 04:20:28 UTC
Linux 3.2-rc3
Linux 3.2-rc3
Tip revision: caca6a0
Kconfig.debug
menu "Kernel hacking"
source "lib/Kconfig.debug"
config DEBUG_RODATA
bool "Write protect kernel read-only data structures"
depends on DEBUG_KERNEL
help
Mark the kernel read-only data as write-protected in the pagetables,
in order to catch accidental (and incorrect) writes to such const
data. This option may have a slight performance impact because a
portion of the kernel code won't be covered by a TLB anymore.
If in doubt, say "N".
config DEBUG_STRICT_USER_COPY_CHECKS
bool "Strict copy size checks"
depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
---help---
Enabling this option turns a certain set of sanity checks for user
copy operations into compile time failures.
The copy_from_user() etc checks are there to help test if there
are sufficient security checks on the length argument of
the copy operation, by having gcc prove that the argument is
within bounds.
If unsure, or if you run an older (pre 4.4) gcc, say N.
endmenu